Organic charge-transfer phase formation in thin films of the BEDT-TTF/TCNQ donor-acceptor system

We have performed charge transfer phase formation studies on the donor/acceptor system bis(ethylendithio)tetrathiafulvalene,(BEDT-TTF)/tetracyanoquinodimethane,(TCNQ) by means of physical vapor deposition. We prepared donor/acceptor bilayer structures on glass and Si(100)/SiO_2 substrates held at room temperature and analyzed the layer structures by optical microscopy, X-ray diffraction and focused ion beam cross sectioning before and after annealing. We found clear evidence for the formation of a charge transfer phase during the annealing procedure. For the as-grown samples we could not detect the occurrence of a charge transfer phase. X-ray diffraction indicated that the monoclinic variant of the (BEDT-TTF)-TCNQ was formed. This was further corroborated by single-source evaporation experiments from pre-reacted (BEDT-TTF)-TCNQ obtained from solution growth, and in particular from co-evaporation experiments of (BEDT-TTF)-TCNQ and TCNQ. In the course of these experiments we found that (0,l,l)-oriented BEDT-TTF layers can be prepared on alpha-Al_2O_3 (1,1,-2,0) substrates at about 100 C using (BEDT-TTF)-TCNQ as source material. We speculate that due to its high vapor pressure the TCNQ component serves as a carrier gas for BEDT-TTF vapor phase transport.Comment: 14 pages, 8 figures. Added new author, new section about co-evaporation technique, new references, new figure

2005-2006 Nothing but Klezmer

Concert Dates: Thursday, November 17, 2005 at 7:30 pm Friday, November 18, 2005 at 7:30 pmhttps://spiral.lynn.edu/conservatory_otherseasonalconcerts/1040/thumbnail.jp

Local governmental audit and accounting manual, as of March 1, 1991: a nonauthoritative practice aid

https://egrove.olemiss.edu/aicpa_guides/1211/thumbnail.jp

Local governmental audit and accounting manual, as of March 1, 1990 : a nonauthoritative practice aid

https://egrove.olemiss.edu/aicpa_guides/1210/thumbnail.jp

2004-2005 Nothing but Klezmer: Swingin\u27 Jazz and Klezmer Band

Concert Dates: Wednesday, December 1, 2004 at 7:30 pm Thursday, December 2, 2004 at 7:30 pmhttps://spiral.lynn.edu/conservatory_otherseasonalconcerts/1051/thumbnail.jp

Results of the life sciences DSOs conducted aboard the space shuttle 1981-1986

Results are presented for a number of life sciences investigations sponsored by the Space Biomedical Research Institute at the NASA Lyndon B. Johnson Space Center and conducted as Detailed Supplementary Objectives (DSOs) on Space Shuttle flights between 1981 and 1986. An introduction and a description of the DSO program are followed by summary reports on the investigations. Reports are grouped into the following disciplines: Biochemistry and Pharmacology, Cardiovascular Effects and Fluid Shifts, Equipment Testing and Experiment Verification, Microbiology, Space Motion Sickness, and Vision. In the appendix, the status of every medical/life science DSO is presented in graphical form, which enables the flight history, the number of subjects tested, and the experiment results to be reviewed at a glance

Psychometric properties of the Impact Index in patients with chronic conditions

The purpose of this paper was to extend the generalizability of the patient-reported Impact Index by assessing convergent validity in patients with common chronic conditions. We conducted a cross-sectional survey of 1,000 English-speaking patients aged 21 and older who visited their provider in the past 6 months and were included in one or more of a hospital’s chronic condition registries. Patients completed a survey that included the Impact Index (4-item measure of how impacted a patient is by their health condition: range 0-12, higher score indicating greater negative impact on quality of life), overall health, and self-report of diagnosis of 8 chronic conditions. Patients were categorized as having symptomatic conditions (one or more symptomatic conditions) or asymptomatic conditions. We hypothesized that Impact Index scores would be negatively correlated with overall health, positively correlated with the number of chronic conditions (using Pearson correlations) and would be higher for symptomatic than asymptomatic conditions (using an independent t-test). Of the 492 respondents (50% response rate), 381/392 eligible respondents completed all Impact Index items. Impact Index scores ranged from 0 to 12 (M=6, SD=4). As reports of overall health increased (i.e., from poor to excellent), Impact Index scores decreased (r=-0.59, p\u3c.001). As the number of chronic conditions increased, so did Impact Index scores (r=0.33, p\u3c.001). Patients with symptomatic conditions reported higher Impact Index scores (M=6.6, SD=3.5) than those with asymptomatic conditions (M=4.1, SD=3.5, p\u3c.001, d=.70). These findings support the validity of the Impact Index for patients with a range of chronic conditions. Experience Framework This article is associated with the Policy & Measurement lens of The Beryl Institute Experience Framework (https://theberylinstitute.org/experience-framework/). Access other PXJ articles related to this lens. Access other resources related to this lens

Long-term Periodicities of Cataclysmic Variables with Synoptic Surveys

A systematic study on the long-term periodicities of known Galactic cataclysmic variables (CVs) was conducted. Among 1580 known CVs, 344 sources were matched and extracted from the Palomar Transient Factory (PTF) data repository. The PTF light curves were combined with the Catalina Real-Time Transient Survey (CRTS) light curves and analyzed. Ten targets were found to exhibit long-term periodic variability, which is not frequently observed in the CV systems. These long-term variations are possibly caused by various mechanisms, such as the precession of the accretion disk, hierarchical triple star system, magnetic field change of the companion star, and other possible mechanisms. We discuss the possible mechanisms in this study. If the long-term period is less than several tens of days, the disk precession period scenario is favored. However, the hierarchical triple star system or the variations in magnetic field strengths are most likely the predominant mechanisms for longer periods.Comment: 33 pages, 9 figures (manuscript form), Accepted for publication in PAS

Environmental Impacts from Pesticide Use: A Case Study of Soil Fumigation in Florida Tomato Production

The search for alternative fumigants has been ongoing since the 1992 Parties of the Montreal Protocol classified methyl bromide as a Class I controlled substance with an ozone depletion potential (ODP) of 0.7 and destined it for phase-out. This paper focuses on the hazards from fumigants proposed as alternatives for pre-plant soil fumigation in tomato production. We use the Environmental Impact Quotient (EIQ) developed by Kovach et al. to estimate the hazards from methyl bromide and the proposed alternative fumigants to workers, consumers, beneficial arthropods, birds, fish, and bees. Our findings indicate that iodomethane 98/2 has the lowest EIQ index value and field use rating, and is the alternative with the lowest relative risk. Among environmental categories, workers and beneficial arthropods experience the highest relative risks from the proposed tomato fumigants, and fish and consumers the least risks

Hubungan Empati Petani Dan Keterampilan Sebagai Fasilitator Di Pusat Pelatihan Pertanian Dan Pedesaan Swadaya Jawa Barat

Tujuan penelitian adalah menganalisis hubungan empati petani dan keterampilan sebagai fasilitator pembelajaran bagi para petani di Pusat Pelatihan Pertanian Swadaya (P4S). Jenis penelitian adalah survei dengan melibatkan 140 orang petani fasilitator P4S di 17 kabupaten, Provinsi Jawa Barat sebagai responden. Sebanyak 86,43% responden memiliki empati dalam kategori sedang dan 13,57% berada dalam kategori tinggi. Sebanyak 54,29% responden memiliki keterampilan memfasilitasi berada dalam kategori tinggi dan 45,71% dalam kategori sedang. Analisis korelasional menunjukkan bahwa terdapat hubungan positif yang signifikan antara empati dan keterampilan memfasilitasi (p<0,05) dengan derajat hubungan yang lemah (r=0,02)